Pilot and night lamp.



E. KEEN.

PILOT AND NLGHT LAMP. APPLlcArloN FILED JAN. I6, 1914.

l 1 47,0 949 Patented July 27, 1915.

2 SHEETS-SHEET l.

E. KEEN.

PILOT AND NIGHT LAMP. APPLICATION FILED JAN. I6, 1914.

Patented July 27, 1915.

2 SHEETS-SHEET 2.

nvm/roe ,5L/0r /fff/v I A Anon/VHS WTVESSES y@ PILOT AND NIGHT LAMP.

i Specification of Letters Patent;

Patented July 27, 1915.

Application led January 16, 1914. Serial No. 812,377.

To all lwhom it may concern:

Be it known that I, ELIo'r KEEN, a citizen of the United States, andresident of the city of Brooklyn, county of Kings, State of New York,have invented a certain new and 'useful Improvement in Pilot and NightLamps, of which the following is a speciication.

. My invention relates to incandescent electric lamps and has for itsobject an Iarrangement by -means of which the position of anincandescent lamp (or controlling switch therefor) of normal candlepower is indicated, when the lamp is ofi' or substantially oli" and theroom is dark.

A further object of my invention is to provide an arrangement by meansof which when said. lamp is switched 0H, either a night lamp of lessercandle power, or a pilot lamp is automatically lighted andvice versa.

More particularly my invention relates to a pull socket of the Hubbelltype, for example, in which electrical conductors are carried down theoperating chain or cord to an auxiliary electric lamp of low candlepower, which terminates said chain or cord. This socket is so arrangedthatV for one pull on the chain the lamp of normal candle power islighted, while for another pull said lamp is extmguished and the nightlamp of lesser power- (or indicating lamp as the case may be) at the endIof the chain is lighted instead. If desired a third pull may totallyinterrupt the circuit, and the device may be so arranged that a fourthpull may be utilized if desired, so that the lamp at the end of thechain may be made to emit only a dim light. 'Where these four pulls areused the results Aobtainable are as follows: One pull gives a dimillumination of. the auxiliary lamp, the main lamp being nonluminous orsubstantially so; a second pull gives full candlepower for the mainlamp,

the v auxiliarys'lamp being non-luminous or substantially so; a thirdpull gives full candle power of the auxiliary lamp, the

,main lamp being non-luminous or substantially so; and the fourthinterrupts the circuit so that both the main and auxiliary lamps arenon-luminous.

. My invention will be better understood by referring to theaccompanying drawings, in

which- Figure 1 represents a preferred embodiment of my invention inside elevation, lthe `shell of the main socket and a part of theauxiliary socket being sectioned for the sake the line 3 3 of Fig. 1;Fig. 4 is the movable contact member of the switch; Fig. 5 is asection,.in plan, taken along the line 5 5 of Fig. l; Fig. 6 is a planview taken from below of the ratchet member of the switch.; and Figs. 7to 10 inclusive are diagrammatic views showing the arrangement ofcircuits for four successive positions of the switch, Fig. 7 showing themain lamp dead and the auxiliary lamp feebly lighted, Fig. 8 showing themain lamp at normal candle power and the -auxiliary lamp dead, Fig. u9showing the main lamp dead and vthe auxiliary lamp fullylighted; andFig. 10 showing the circuit totally interrupted, thatcis, with both themain and the auxiliary lamps dead.

In the drawings, 1 is a pull socket of sub? having equally spacedprojecting lingers 7 adapted to engage corresponding depressions 8 in acontact member 9 arranged to rotate independently about the same centeras the switch member. l

Spaced equally about a lower insulating disk 10 are four metallic posts11, 12, 13 and 14 some or all of which support the upper insulating disk15. Of these posts 14 and 12 act as stops for the movable switch member5, the end 151 of said member engaging post 14 when the switch is atnormal position and the notch 16 engaging post 12 when the switch iscarried to its other limiting position by a pull upon the chain 3. v

A resistance 17, preferably wound upon a suitable spool, rests in thetop of the upper insulating'member 15 just beneath the cap.

The circuits are arranged as shown the'd'iagrams, Figs. 7-10, one'of themam conductors 18 going in the usual way to the i .socket shell 19 andthence, through the main connects to the other end of resistance 17 andto a conductor 23 which passes down through the chain 3 to the auxiliarylamp 4, while another conductor 24 from auxiliary lamp .5 4 passesthrough the chain and connects to conductor 22 and post 12. Thetwoconductors 23 and 24E have each a few loose turns 25 lying freewithin the space between the two insulating heads.

The main and auxiliary lamps are so chosen that when in series theauxiliary lamp will give full candle power while the main lamp will onlybe very dimly illuminated if at all, and the resistance 7 is so chosenthat when it is in series with the main and auxiliary lamps, theauxiliary lamp will run at low candle power, while the main lamp, again,will be barely visible at all.

By tracing the connections in the various diagrammatic views inaccordance with the above explanation, it will be seen that when thecontact finger 21 is in the position 'of Fig. 7, the main lamp,auxiliary lamp and 25 resistance 17 will be in series. This condition isdesirable where only a pilot lamp is desired for the purpose ofindicating where the main lamp (or switch therefor) is located and ofenabling the main lamp to be 80 turned on quickly and with certainty inthe dark.

In Fig. 8 the finger has been turned to the next post 12 by one pull ofthe chain and the main lamp is fully. on at normal candle 85 power; theauxiliary lamp is entirely cut out.

In Fig. 9 the chain has been again pulled and the contact finger movedto the next post. The main lamp and auxiliary lamp 40 are now in seriesand the latter, therefore, becomes a night light of full candle power soas to afford appreciable and reasonable illumination of the room withoutfully illuminating it, the main lamp itself being dark or substantiallyso. 'y

In Fig. 10 the contact finger has been advanced one step farther byanother pull on the chain and now rests upon the dead post 14 and themain circuit is entirely interrupt- W ed so that both lamps are oil".

While I have described a preferred form of socket, variations in detailmay obviously be made within the spirit of my invention Vand theparticular socket chosen has been merely because I find it a convenientone.

As previously stated I may, instead of having four different switchpositions, asv

described, giving four different arrangements of circuit used, have onlythree or even two of said positions within the spirit of my invention.Having described my invention, I claim:

1. The combination of a main lamp, a socket therefor, a switch withinsaid socket,

55 a cord for moving said switch, an auxiliary lamp carried by saidcord, and conductors within said cord extending from the auxiliary lampinto the aforesaid socket, the main lamp only being in circuit for oneposition of the switch and the main lamp and auxiliary lamp being inseries for another position of the switch.

2. The combination of a main lamp, a socket therefor, a. switch withinsaid socket, a cord for moving said switch, an auxiliary lamp carried bysaid cord, and conductors within said cord extending from the auxiliarylamp into the aforesaid socket, the main lamp only being in circuit forone position of the switch, the main lamp and auxiliary lamp being inseries for another position of the switch, and both main and auxiliarylamps being out of circuit lfor a third position of the switch.

3. The combination of a main lamp, a socket therefor, a switch withinsaid socket, a resistance attached to said socket, a cord fory movingsaid switch, an auxiliary lamp carried by said cord, and conductorswithin said cord extending from the auxiliary lamp into the aforesaidsocket, the main lamp, auxiliary lamp and resistance being in series forone position of the switch, the main lamp and auxiliary lamp only beingin series for another position of the switch and the main lamp onlybeing in circuit for a third position of the switch.

4. In combination, a lamp socket provided with a movable switch fingerand adapted to take a main lamp, a resistance attached to said socket, acord for moving said l finger carrying an auxiliary lamp, conductorswithin said cord extending into said socket and adapted to be joined tothe auxiliary lamp, and contact members within sald socket adapted to besuccessively touched by the switch finger for successive 4 pulls of thecord, the main lamp, auxiliary lamp and resistance being in series forone position of the switch finger, the main lamp and auxiliary lamp onlybeingin series for another position of the switch finger, and the mainlamp only being in circuit for a third position of the switch finger. v

5. In combination, a lamp socket for a main lamp, a movable switchmember therein, a cord having a socket for an auxiliary lamp andprovided with conductors running from said socket to the main socket formoving said switch member, and electrical con- 12 ductors within thesocket, said switch member being arranged to control the distribution ofcurrent from a common source to the two sockets, `as and for the purposedescribed.

6. The combination of a socket for a main lamp, a switch within saidsocket, a resistance attached to said socket, and conductors dependentfrom the socket carrying an auxiliary lamp at one end and mechanicallyat- 173 tached to the switch at the otherend for In testimony whereof Ihave hereunto set moving the same, the main lamp, auxiliary my hand inthe presence of two subscribing 10 lamp and resistance being in seriesfor one Witnesses. position of the switch, the main lamp and auxiliarylamp only being in series for an- ELIOT KEEN other position of theswitch, and the main Witnesses: lamp only being in circuit for a thirdposi- ELMER G. DILYOUNG,

tion of the switch. JOHN A. KEHLENBECK.

